Starting device for internal-combustion engines



P. coRNlERE STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES.

Filed Aug. 10, 1922 2 sheets-shew 1 Oct. 21 1924.

, P. coRNlRE STARTING DEVICE FOR' INTERNAL COMBUSTION ENGINES .Filed Aug. 1o, 1922 aaneen-sneer 2 flaky Patentaall cl. 2l, 1924.

UNiTED sTATssr/ATENT oFFiicm PAUL CORNIRE, O'F CLICHY, FRANCE, ASSlG-NOR'TO SOCIETE DE MECANIQUE 'NOUVELLE OF PAIR-IS, FRANCE. y

STARTING DEVICE y ron INrEENAnooiviBUsrioN- ENeiNEa` Application filed August 10, `19222. Serial No. 580,993.

To alli/)71.0111f7/my.cf/noemt: Y y n Be it known that I, PAUL CoizNiRE, a citi- Zen of France, and a resident "of (Seine), France, have invented certain new and useful Improvements in Starting Devices for Internal-Combustion Engines, which is fully set forth in the following specification.

The invention relates to starting device of internal combustion engines and consists in providing a small auxiliary cylinderwlierein the piston is driven in one dii'ec'tionfby anexplosive mixture andreturned vto its initial position by a spring. The piston rod is formed with a rack which is so connected to the engine shaft that the latter isrotated on the power stroke of the piston. Y.; j

The invention further consistsin providing means for producing an explOSiv@ Dflx` ture and for injecting the .sameas' soon as produced, into the engine cylindenmeans .for

igniting the mixture in the cylinder .being also provided. The burnt products ,ofcomrbusion are exhausted, at the end ofthe power v throughV a port lin the communicating with a stroke of the piston, piston head, said port p passage in the piston rod that communicates with thecylinder below the piston. A.y valve controlling the port is operated automati-y cally by the movement of the piston to opent said port at the end of the power stroke and to close'the same upon the return of the .pis-

ton to its initial position. n,

The following description, A together y with the acompanyng drawings which are given by way of example, sets forth this invention saidv device. Figs; 2 and 3 relate to a m'odi.y

Fig. l shows in axial section yand partly in external view, one form of construction of fied form. Fig. 2 being an axial section `and Fig. 3 a section on the line'Z-EZ of,Fig ;.Z.`

The device, Fig. 1, comprises a smallauxiliary cylinder` a containing a piston bvvhose rod blisformedwith arack at 'b2 which engages pinion c coaxial with driving shaft d,

whichV isto he started; pinion c is. provided with the pawls c1 co-operating with a ratchet wheel d1 keyed to the driving shaft so as to actuate it in only one sense of rotation of pinion @,i. e. for the movement of auxiliary piston b in only one sense (for the power stroke or to the left).

One can deliver into the explosion chamkher of c auxiliary cylinder L an' adequate charge of explosive mixture hy a' hand pumpV plunger type,

s cylindera,

' of the piston rod 51 inder a.

right, under the actionr e which connects at one end by the conduit c1 with saidy explosion chamber and at the other en d .by the conduit e2 to a reservoir c3. containing said mixture. A cock or check-valve @4 is mounted on the conduit e2 to prevent said mixture from passing into the pump c except during. the suction stroke of .the pump; a check valve e5 is mounted on the conduit el to prevent themixture which is delivered into the explosion chamber of cylinder a from returningfinto the pump e. A y spark plug al which is mounted in a suitable manner in the. cylinder head a2 'of the cylinder a and is connected to a magneto c ofthe will aord one, or two sparks at the proper moment inthe explosive mixturev which is delivered by the pump c' into in order to ignite this mixture.

y The piston 7i. carries la valve kbf" whose stem vbf* passing Vpiston rod b1 carries theA tappets f f1; a lengthwise groove 56 formedin the thickness connects the axial passage b5 of said rod with the interior of cylkDuring the power stroke, ythe piston b communicates, rthrough the rack b2, pinion c" and pawls 01, an impulse to ythe shaft d; when the pistonreaches `the end ofthe stroke, (towardsl the left), the tappet f on the valve'` b34 "makes contact witha linger. tenonor the like carried/at.theehd yof the cylinderand extending.throughV the slot 726 of thepassage ZJ5, thereby 'opening' ,thel valve 53. When the pistonr moves to the ofrits return .spring` 57, the burnt'gas escapes from the explosion kchamber through valve b3 which is lifted mosphere through the holesa*y provided in the end'of the cylinder. At the end of the return stroke ofthe piston (position shown in theffigur'e) the tappet g acts upon an other tappet;c1 'on the valve stem and closes valve '63. j ,V y

'The auxiliary piston is rthus ready to give a new power movement to shaft (Z, should. the irst'one not have been effected suiiiciently to perform the starting. n

In the form of construction lshown in Figs. 2 and 3, the rod b1 of piston b of the auxiliary cylinder ay carries valve b3; a coiledkk spring be,niounted'within 'the piston rod b1 through an axial passage b5 in the rod ZY* of 1 of the cylu e valve 3 has a higher' tension than the piston 7) is moved greater than between a shoulder t on the piston rod and a collar b1 of the valve stem bf2-tends constantly to lift the valve b2' from its seat. But said valve b2 is on the other lia-nd acted upon by a' spring having spirals of a variable diameter disposed betweenl said valve b2 and the head a? of the auxiliary cylinder. Vhen the piston is atthe end of the stroke towards the interior under the action of the return spring b2, the spring f which is compressed between the cylinder head Z2 and .the spring b3 remains closed.V then forward bythe explosion of the mixture ca rb uretted between the head (1.2 of the cylinder andV the piston Zi, the tension' of spring j' gradually diminishes until it becomes smaller than that of spring b3, when the piston has almost .reached tlieend of the outward stroke; at this moment, valve Zi is lifted byspring bs, andthe burnt gas escapes from t-he explosion chamber below the valve 7) and through the hollow piston rod b1, to the exterior. The` piston Y) is now brought to the end of its stroke towards the interior by the return spring 67 whose tension is 58, so that valve compressed and closes valve bi.

The explosive mixture is sent at the proper Vtime into the auxiliarycylinder by ka hand pump g surrounded by a .gasoline reservoir h provided with a fillingV plug h2.` By operating the piston g1 of pump g, a certain vacuum is produced upon the fuel in said reservoir which is connected to said pump by a nozzle h6 and a tube 71.5. On the wall of said reservoir is provided an air inletrhole 71,. above the level of the liquid and of suit-able crossi section, it beingr adjustable and about 5 hundredths of a millimeter in diameter and permitting therregulation of the quantity of gasoline sup-plied to the nozzle 71.6, this quantity of gasoline being' the same as the quantity` of air entering the reservoirI through the nozzle 7b3. n j

During the delivery stroke of the piston g of pump g, the latter sends a certain amount of fuel through the tube he which connects with the explosion chamber of the auxiliary cylinder d; said fuel which is atomized and mixed with air is thus sent into said explosion chamber wherein it is ignited by one or more sparks produced by spark plug d1 mounted in cylinder head L12 and connected to a magneto e6 which is preferably driven by a pinion c7 engaging a` gear wheel having a square fit upon the rod of Y pump g; in these conditions the rod is operated to pump when Vit is pushed, then to drive the magneto for the starting. when it is ro-V tated.r A stop valve g2 of ball type prevents gas from returning into the pump g and gasoline. reservoir h. during the explosion of the mixture in the auxiliary cylinder a.

During the outward stroke caused by'exthat of the spring #which is plcsion in the auxiliary cylinder a, see Figs. 2 and 3 the Vpiston b acts on shaft d of the engine which is to be started, by means of the following device. The rack b2. formed in the rod b1 of piston, is engaged with a pinion i keyed to an intermediate shaft l A l the stud 7'1 engaging groove 2, and causesit to engage the sleeve (Z1, i. e., to actuate shaft cl; when the piston rises under the, effect of its return spring 57, the shaft l turns in contrary sense and lthe sleeve 7' moves to the right upon said shaft, whereby it is released from sleeve all and ceases to actuate the shaft al.

It is obvious that the embodiments hereinbefore described are susceptible of all dej sired modifications without departing from the principle of the invention.

What I claim is: y Y y l. A ydevice for starting internal coinbustion engines, comprising an auxiliary cylin.

der, a piston disposed inthe latter, Va pump for supplying an explosive mixture to the t cylinder,'a spark plug disposedin said cylinder, a magneto for roducing a spark at the plug, a rack formedo uponthe piston rod, a pinion oo-operating with said rack, a mechanicalconnection between the said pinion and theY crankshaft of the engine, and automatic means for. returning the piston of the auxiliary cylinder to the initial position after thedown stroke of the same.

2. A device for starting internal combustion engines, comprising an auxiliary cylinder, a piston disposed in theV latter, `tubular rod secured to said piston,v an exhaust valve mounted within saidy rod, a coiled spring disposed within therpiston rod for lifting said valve, and a. spring mounted between the top of the valve body andthe end of the cylinder whereby. said valvejis held closed-when the piston is in its initial positionv while the valve is permitted Vtoopen when the piston descends, ai hand pump for supplying Aan explosive mixturev to the cylinder, means for effecting-.the ignition of` the. explosive mixture at will, a rack formed upon the piston rod, a pinion co-opera-tingwith said rack, a mechanical connection between saidpinion and the crankshaft of the engine, and a spring disposed between the, piston and the .lower end of the cylinder whereby said piston isfreturned to the initial position.

VA3.L A device for starting internal combustion'engines, comprising an auxiliary cylinllO der, a piston in the latter, a fuel reservoir, a passage connecting said reservoir with the auxiliary cylinder, a nozzle disposed within said passage, a hand pump delivering into said passage above the said nozzle, whereby an explosive mixture` is supplied to said auxiliary cylinder by the movement. of they ysaid hand pump,

a spark plug in the auxiliary cylinder, a magneto for producing Va spark at; the spark plug, a mechanical connection between the shaft of the magneto and the rod of the hand pump whereby the rotation of the rod of the pump will effect the rotation of the magneto, and a mechant cal connection between the rod of the auxiliary piston and the engine shaft.

4. AA device for starting internal combustion engines, comprising an auxiliary cylinder, a piston in the latter, means forsupplying an explosive mixture to said cylinder,

- pling sleeve is caused means for igniting the mixture, a piston rod having a rack formed thereon, a pinion cooperating" ywith said rack, a. shaft on which said pinion is mounted, a helical groove formed in said shaft, a coupling sleeve on the latter, a stud on said sleeve co-operating with'the helical groove whereby said couto slide and to rotate uponV the rotation of the shaft, a sleeve mounted upon the shaft of the internal combustion engine` and co-operatingwith said coupling sleeve whereby the rod of the auxiliary piston is connected with the engine shaft in only one direction of movement of the auxiliary piston, and means for automatically returning the piston to its initial position.

In testimony whereof I have signed this specification.

PAUL GORNIERE. 

